Home / 10,912.36-16,368.50-3,121.16

Finding the Fourth Proportional to 10,912.36, 16,368.50 and 3,121.16

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Solution

The fourth proportional to 10,912.36, 16,368.50 and 3,121.16 is: 4,681.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.36 : 16,368.50 = 3,121.16 : x
  2. Step 2: Convert to fraction form
    10,912.36/16,368.50 = 3,121.16/x
  3. Step 3: Cross multiply
    10,912.36x = 16,368.50 × 3,121.16
  4. Step 4: Simplify right side
    10,912.36x = 51,088,707.46
  5. Step 5: Solve for x
    x = 51,088,707.46/10,912.36
  6. Step 6: Final answer
    x = 4,681.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.